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Bringing back an old thread with a complete different set up. Same vehicle. Same results. Running a Stryker 955 now, with a Wilson 5000 roof top hard mount in the roof. (04 GMC regular cab Sierra 4x4). Sanded the inside of cab portion of roof where the hard mount attaches. Everything is RG8X. I’ve got the coax cut down from antenna to just behind and between the two seats fed into a 2 pill HD. 6’ jumper to radio. (No extra coax). SWR is a flat 1.0:1 from 26.775-26.755. Radio is basically stock power settings. Driving about 5 watts DK into the box. When switching on the amp, and modulating, I get the same issue as I had mentioned previously with the throttle body acting erratically and causing the truck to jerk. Hood, doors, bed are all bonded.